Warp beam



Aug. 29, 1933. F. c. WASHBURN WARP BEAM Filed Sept. 1, 1931 n 5,. r .y W V U a w M L M wC [8% m I u x H b 9,0 A a 4 J (1/0 "1 |L& H '11 H/ w a L I 2 r Z fl WN M m H "7 ,4 2 J 4 VA 2 Am 7 m/ 2 5 i 6 (0 2 2 2 2 3 9 .9 9 M 7 z. in the 'gheads before 55 Patented Aug. 29, 19 33 UNITED. STATES PATENT OFFICE 1,924,387 R B MX i I ErederickC. WashbunnNew Bedford, Mass. 7 V7 p ApplicationSept ember 1.193 1. sj ia Nmscog'sss r 4 Claims. 01. 242-111 8) This invention relates to warp beams more particularly to improvements in beam heads for warp beams of the type shown and described in my United States Patent No; 1,741,800; dated December 31, 1929. The principal object of the invention is to provide improved means for tensioning the heads against the beam ends so" that the heads will .not separate from the beam or become deformed by the pressure of the yarn wound upon the beam. p

In the manufacture of warp beams the cast iron discs formerly employed as "beam heads have largelybeen superseded by lighter and less rigid heads formed of pressed steel or laminated wood. Although the lighter heads are not subject to breaking or cracking from'casting de-' fects and are generally more satisfactory than the cast iron discs; they are liable to spreading N V at their peripheries or to become, separated from the beam ends owing to the'axial pressure-applied against their inner faces by themass of yarn upon the roll. It has accordingly been found desirable to reinforce the lighter and.

more flexible heads, and several expedients have been devised in an effort to stifien and prevent angular deformation of the heads.

These expedien'ts have usually consisted in providinglocal reinforcement at the center of the heads by forming radial'ribs in. the pressed steel heads, by providing reinforcing discs around .the shaft opening, or by utilizing both arrangements in combination. Although these reinforcing devices have assisted in strengthen- V ing ,the central portion of the heads and have to some extent obviated actual separation there of from the beam ends, they have not satisfactorily overcome the spreading. tendency at the periphery of the beam head. It is consequently found that the lighter heads become permanently dished outwardly after repeated use, as a result. of the accumulating pressure exerted against the peripheral margin of the headsas the beam 7 v fills i seriesof "crossed supportingfmembers.12fand It .is therefore the principal purpose of; the

dishingor curling at the peripheries of light weightbeam beads by formin'g'an annular shouldeer or abutment on head and providing a rigid;non-compressible bracing member arranged to hear at its periphery against said shoulder to resist outward deflection at. the rim .of the head. 7 An initial inward-deformation or fcupping may be induced: they are secured to "the warp beam, to allow avery slight spreading "at ,its convex surfac against distorting strains directed arrangement-of the bracing plate'of Fig; 1, prior present invention to avoid the. objectionable v blocks; are rigidly the outer face of the beam suitable fastening means,' and the blocks have axial openings {receiving the beam shaft 16;, p One p'a irv of the crossed supports is v, arranged-f near each end'of the cylinder 11 in :order that one ofthe-ine'mbers may form part o ff 'a clutch;

therimsof' the heads without causinganout wardly dished set .at;their peripheries. T0 the attainment-ofthese objects, the head is preferably made slightly concavo-convex and provided with a concentric annular shoulder bordering'ashallow recess ofsubstantial width in V 'efa bracing plate preferably is inserted in the recsswith its periphery abutting said-shoulder and with its central portion spaced from the central portion of s'aid'recess, and the plate is clamped to the "head under sufficient pressure to draw together said spaced'central portions. The "head is accordingly tensioned against the periphery of its inner concaved side. i A further object'of the invention is to provide a clutch collar on the innerconcave face of the heads said collar havingspaced inwardly directed jaws-arranged to receive an interior cross support'of the beam to restrain relativeirotation between the beam cylinder and its'heads.

Recommended embodiments of the invention 7 are illustratedintheaccompanying drawing, inv I which: f "1/ Fig; 1 is a broken longitudinal section of the improved warp' beam, illustratingone form of head-tensioning means;

with the periphery of the beanrhead broken away; Q li'ig. 3 includes front and edge views of the clutch collar; 1 g 7 3 Fig; 4 is an enlarged section showing the to the clamping of the plate to the head; and

igs.' 5 to Bare views similar to Fig. '4 illustrating optional arrangements of the bracing I plate.-- 7 U The body of the warpbeam may comprise a cylinder or barrel 11, preferably of built-up cor struction and consisting of interlocking staves, and interior suppo'rts preferably including 'a. i

subsequently to be described"; 7 v

The beam heads'l'l may be forme v.

.annular grooves 13 receiving cylinder 11, and a grooved belt race 19 around 2 either single ply or laminated, of pressed steel, or of other light-weight material which is sufilciently rigid and durable in use, and they are preferably preformed as concavo-convex discs, as aforesaid. The concavity of the heads is considerably exaggerated in Fig. 1; it need only be slight in any case, to overcome the outward spreading tendency at the periphery of the head, and in'some cases may be dispensed with altogether. The heads are mounted upon ,the projecting ends of the shaft 16 and 'may have the endsof the theirperipheral edges. Nuts 20 threaded upon the shaft serve to secure the heads against the beam ends. a j In the structure shown in Figs. 1 and, the outer, convex side of the head has a concentric recess 21 providing an outer annular shoulder or abutment 22, and the recess is formed with an annular step 23 adjvacentjthe shoulder 22 so that the recess is deeper, in its central region than at its periphery. The beam head preferably has substantial thickness, and the shoulder is located a considerable distance from the axis of the head. A fiat, metal,- bracing plate or disc 24 fits within the shoulder 22 and seats at its periphery upon the step 23, leaving a space 25 between its inner face and the bottom of the recess 21 at'said central region (Fig, 4) The plate is clamped tothe head .by bolts 26, preferably after. applying pressure upon the outer side of the plate and the inner side of the head respectively, to close the space 25 at the.

central portion of the tensioned members, as

indicated at 27 (Fig. 1). When so secured, the.

peripheral edge ofthe non compressible bracing plate 24 bears against the shoulder 22 thereby exerting a'radialstress directed against said shoulder which, owing to its distance from the center of the a, head and the thickness of the head, serves as a fulcrum analogous to that of a bellcrank, I so that an axial force directed against the peripheral margin of the head at its opposite side (as by the yarn wound on the beam) and tending to bind or deflect the rim of the head outwardly, is effectively resisted.

The resisting stress of the bracing plate is enhanced when, as shown, an initial inward concavity of the head is induced and maintained by clamping the plate to the head under pressure thereby to close the opening 25 between the plate and the head. Said space may be provided in various ways, some of which are illustrated'in'Figs. 5 to 8. In Fig. 5, a'washer 28 takes the place of the step 23 of Figs. land 4; in Fig. .6 the bracing plate is dished or sprung outwardly at 29 to provide the initial central space between the plate and bottom of the head recess; in Fig '7 the plate has radial ribs 34 and aninwardly offset rim: 30 at its periphery; and in Fig. 8 the plate has an annular rib 31 providing a projection on its inner'surfa'ce adjacent. its periphery; The initial central space '25 may be varied in depth according to'the de gree of tension desired.

The. inner heads of against a plate or collar 32 on the inner face of tha head, and in the preferred form illustrated iniFigs. l'to.3, the collar has parallel inwardly 'directedjaws or flanges 33 receiving and mating with one of the cross blocks of the end supports.

;.The' cluthjaws accordingly cooperate with the f cylinder supports to prevent relative rotation between the cylinder andits headaeven when; the

beam and its yarn load are rotating at a high speed with one or both of the heads under braking restraint. This feature is an aspect of the present invention which may be employed independently of the head tensioning'devices above described, and constitutes an improvement upon the clutch elements described and claimed in Patent No. 1,741,800. a

A warp beam-constructed as above described is simple andrelatively inexpensive to manufacture and has been found to be durable and satisfactory in use. The improvedstructure of the beam heads and bracing plates obviates spreading or outward cupping of thelightweight heads,

and is especially applicable to heads of laminated wood which are relatively inexpensive. It will 7 be understood, however, that structural details of the device herein shown and described may be varied for particular purposes without departing from the essence of this invention as defined in the following claims.

I claim: 1 1. A warpbeam comprising a cylinder, beam heads secured against the opposite ends of the cylinder, each head having a substantially circular, concentric recess in its outer surface providing an annular abutment distant from the axisjof the head, and arigid bracing disc fitting within the recess of each head with its periphery bearing against said shoulder, and means for clamping the central portions of the discs against the outer surfaces of the respective heads, so that the radial stress of the rigid discs resists outward angular deflection of the rims of the heads. 7 I r 2. A warp beam comprising'a cylinderybeam heads secured against the opposite ends of the cylinder, each head having a substantially circular, concentric recess in its outer surface providing an annular abutment. distant from the axis of the head, and a rigid bracing disc fitting within the recess of each head with its periphery bearing against said shoulder, and means for clamping the discs against the respective heads, so. that the radialstress of the rigid discs resists outward angular deflection of the rims of the heads, the central portion of each beam head being tensioned against its bracing disc by said clamping means, to induce an inward curvature of the head. 3. A warp beam comprising a cylinderfbeam heads secured against opposite ends of thecylinder, each head having a substantially circular,

- concentric recess in its outer face providing an the respective discs and tending to clamp thediscs to the heads and to close said spaces thereby to induce an inward. curvature'of the heads, the central portions of the heads beingfthus and .the outward radial stress of the tensioned rims of the heads. V i a 4. Awarp beam comprising a cylinder, beam heads secured against the opposite' ends of the. cylinder, theiheads'being inwardlyconcaved and each head having asubstantially circular,con centric recess; in its outer surface providing anannular shoulder bordering said recess, a rigid V drawn intoengagement withasaididisc portions the .bolts26' may seat Q discs resisting outwardangular deflection of the bracing disc fitting within the recess 01' each head and bearing flatwise against the outer porv a 3 heads, said bolts being tensioned to draw the headand plate together at the central portions thereof and substantially close said space, thereby tending to maintain the inward concavity of the heads.

FREDERICK C. WASHBURE, 

